During the solar car team's wind tunnel trip to Detroit last January, we met up with Ford MIT alumni and hitched a ride in a few of the company's hydrogen fuel cell and hybrid vehicles. They were smooth and very quiet, much more purr than vroom.
But here's a funny engineering design "flaw": though otherwise an asset, the quietness of the vehicles can be a danger when pedestrians can't hear them coming. So, electrics and hybrids may be getting "car tones," sounds that car owners will choose for themselves much as cell phone users choose their ring tones. Pimp your Pruis!
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